Orion NEWTONIAN ASTROGRAPH 9527 User Manual

INSTRUCTION MANUALIN 378 Rev. A 1/10Customer Support (800) 676-1343 • E-mail: [email protected] Offices (831) 763-7000 • 89 Hangar Way,

10The view through the collimation cap should now resemble Figure 9e. A simple star test will indicate how well the tele-scope optics are collimated.S

11the Phillips-head screw is unthreaded, the secondary mirror and its holder can be removed from the telescope. The sec-ondary mirror does not need to

12One-Year Limited WarrantyThe Orion 8" f/4.0 Newtonian Astrograph is warranted against defects in materials or workmanship for a period of one y

2Congratulations on your purchase of an Orion® 8" f/4.0 Newtonian Astrograph. It features fast, high-quality parabolic optics; a machined, dual-s

3are M6. It is likely that only the center hole will be needed to attach the rings to a dovetail plate for your mount or for your guide scope assembly

4Using 1.25" and 2" AccessoriesThe 2" focuser can accommodate both 1.25" and 2" accesso-ries, including just about any eyepie

5is centered on the crosshairs of the finder scope and in the telescope’s eyepiece, the finder scope is aligned and ready to be used for locating obje

6Imaging with the 8" f/4.0 Newtonian AstrographThis instrument has fast f/4.0 parabolic optics, which pro-duce bright images and allow fairly sho

7is a relatively easy process and can be done in daylight or darkness.To check collimation, remove the eyepiece and look down the focuser drawtube. Yo

8NOTE: The center ring sticker need not ever be removed from the primary mirror. Because it lies directly in the shadow of the secondary mirror, its

9By “radial position” we mean the position of the secondary mirror along the axis perpendicular to the focuser drawtube, as shown in Figure 13. This p